Alvin translucent tracing paper sheets are ideal for technical education use. Medium weight, 18 lb. basis, pure white tracing papers. Inexpensive, tough sulphite bond is an economical substitute for professional-quality vellum paper. Fine working surface for sharp pencil or ink lines and very good erasability characteristics. Produces high-quality white print Diazo reproductions. 500-sheet packs. Alvin budget tracing paper sheets are made in the USA.